<template>
      <div class="list" ref="wrapper">
         <div>
            <div class="area">
               <div class="title border-topbottom">当前城市</div>

               <div class="button-list">
                  <div class="button-wrapper">
                     <div class="button"> {{this.city}}</div>
                  </div>
               </div>

            </div>
            <div class="area">
               <div class="title border-topbottom">热门城市</div>
               <div class="button-list">
                  <div class="button-wrapper"
                       v-for="item of hotCities"
                       :key="item.id"
                       @click="handleCityClick(item.name)"
                  >
                     <div class="button">{{item.name}}</div>
                  </div>
               </div>
            </div>
            <div class="area" :id="key" v-for="(item ,key) of cities" :key="key" :ref="key">
               <div class="title border-topbottom">{{key}}</div>
               <div class="item-list">
                  <div class="item border-bottom" v-for="innerItem of item" :key="innerItem.id">{{innerItem.name}}</div>
               </div>
            </div>
         </div>
      </div>
</template>
<script>
 import {mapState,mapMutations} from 'vuex'

import Bscroll from 'better-scroll'


export default {
  name: 'CityList',
  props: {
    cities:Object,
    hotCities:Array,
    letter:String
  },
   computed :{
     ...mapState(['city'])
   },
   methods: {
      handleCityClick (city) {
         // this.$store.dispatch('changeCity',city)
       //  this.commit('changeCity',city)
         this.changeCity(city)
    },
      ...mapMutations(['changeCity'])

   },
  watch : {
      letter () {
          if(this.letter) {
             const element = this.$refs[this.letter][0]
             this.scroll.scrollToElement(element)
          }
      }
    },
    mounted () {
        this.scroll = new Bscroll(this.$refs.wrapper,{
           click:true
        })
        /* this.list.forEach((item,key)=>{
            console.log(this.$refs[item.id])
         })
         */
    }

}
</script>

<style lang="stylus" scoped>
@import "~styles/varibles.styl"

   .border-topbottom
      &:before
         border-color:#ccc
      &:after
         border-color:#ccc
   .border-bottom
      &:before
         border-color:#ccc
   .list
      position:absolute
      top:1.58rem
      left:0
      right:0
      bottom:0
      overflow:hidden
      .title
         line-height:.54rem
         background:#eee
         padding-left:.2rem
         color:#666
         font-size:.26rem
      .button-list
         overflow:hidden
         padding:.1rem .6rem .1rem .1rem
         .button-wrapper
            float:left
            width:33.33%
            .button
               text-align:center
               margin:.1rem
               border:.02rem solid #ccc
               padding:.1rem 0
               border-radius:.06rem
      .item-list
         .item
            line-height:.76rem
            padding-left:.2rem


</style>
